Merge pdf

The job is one file out. A cover plus a signed last page. Phone scans of IDs next to an offer letter. An appendix that arrived as its own PDF. You already have the pieces. Merge pdf is how you glue them in the order a reader should see them. If the packet is already one document and you only want it smaller, that work sits on compress pdf. If you need pages back out as their own files, that work sits on split pdf.

Why merge pdf on this machine

A website merge uploads the files, does the job on their side, then lets you download the result. That is fine for a public flyer. It is a bad fit for a packet with names, account numbers, or a medical form. Merge pdf on this machine means Stirling PDF runs on Windows as a desktop app, or in Docker and you open http://localhost:8080. The files do not have to leave the PC you already use.

We point at Stirling PDF. We did not make it. Official files live on GitHub Releases. This site does not host the installer, the image, or your PDFs. Skip Softonic, CNET, and unofficial sites that wrap the name.

iLovePDF can sit number 1 for people who want a tab. That is a website toolkit. Their web merge sends the files through their service. Stirling PDF vs iLovePDF is the comparison if you want that difference in one place. This page stays on merge pdf.

Install so merge pdf actually runs

Paste this into Windows Terminal or Command Prompt:

winget install StirlingTools.StirlingPDF

If winget is missing, install App Installer from Microsoft, then paste the command again. Official Microsoft links only. The other Windows path is GitHub Releases: open the latest release and pick the installer for your machine. Details sit on PDF editor download and How to install winget.

Docker is the other install path. Copy the compose file on PDF editor Docker, run it, then open http://localhost:8080. Login is on by default on that compose. The Merge tool in that tab is the same job as the desktop app. Use one install. Do not mix two copies and wonder which folder you saved to.

How to merge pdf on the desktop

1. Install Stirling PDF with the command on this page, or the installer from GitHub Releases.
2. Open the app on this Windows machine. Desktop does not need the Docker login.
3. Open the Merge tool. Stirling PDF is a toolbox. Merge is the tool for combining files. Do not start in Compress or Split.
4. Add the PDF files. Put them in the order you want in the finished file. First file in the list is the first pages. Last file is the last pages. If a cover belongs in front, it has to sit first in that list.
5. Run Merge. Save the new file into a folder you control. Open it once and check page order before you send it.

If Merge refuses a file, that file may be damaged, password locked, or not actually a PDF. Unlock or repair is a different tool in the same app. This page does not walk those. Get a clean PDF, then merge pdf again.

How to merge pdf in Docker on localhost:8080

1. Run the official compose from the Docker page on this site.
2. Open http://localhost:8080 on the same machine. Do not point this at a public URL unless you meant to host it.
3. Sign in if the compose still has login on. Then open the Merge tool.
4. Add the PDF files from disk. Order still matters. The list is the page order.
5. Run Merge. Save the result on this machine. The tab is a UI. The files still live on your disk when you download the result back out of that local app.

localhost:8080 is your instance, not a website we run. If the tab does not open, the container is not up. Fix compose first. Do not upload the same packet to a random merge site while you debug Docker.

Order, names, and what merge pdf does not do

Merge pdf concatenates pages. It does not redesign the document. Fonts stay. Page size stays. A landscape scan stays landscape next to a portrait letter. If you needed a smaller file, that is compress pdf after the merge, or instead of it when you already have one PDF. If you needed chapters as separate files, that is split pdf.

Name the output on purpose. merged.pdf in Downloads next to five other merged.pdf files is how people attach the wrong packet. Use a name that matches the job: 2026-tax-packet.pdf, offer-plus-ids.pdf. Keep the inputs until you have opened the output.

Forms and signatures: merge pdf keeps pages. It does not promise every interactive field still works the way a single original did. Open the result. If a signature field is gone, you still have the page image. Flattened scans merge cleanly. Live forms can be picky. Check before you file.

Two files is the minimum. Ten files is still merge pdf. A folder of fifty scans is still this job if the output is one PDF. Add them in order. Do not expect Merge to sort by filename unless you lined the list up that way. A common miss is dropping files in the order the file picker returned them, which is often by name, not by the order you scanned. Look at the list. Move the cover to the top if it landed in the middle.

Bookmarks and outlines in the source files may or may not survive a concatenate. Treat them as a bonus if they appear in the output. Do not plan a filing system around them until you have opened the new file and looked. Page numbers printed on the pages are part of the artwork. Merge does not reprint "Page 1 of 40" for you. If the appendix still says page 1 on its first sheet, that is expected. You concatenated files. You did not rebuild a book.

Checking the packet before you send it

Open the output at the first page, a middle page, and the last page. Confirm the cover is first. Confirm the signed sheet is where you wanted it. Confirm you did not drop a blank scan in twice. If the list had the same file twice, the output will too. Remove the extra, run Merge again, save under a new name so you can tell the two attempts apart.

Mixed page sizes are normal. A letter-size form next to an A4 scan next to a phone photo exported as PDF will still merge. The reader may see different paper in one file. That is the source, not a bug in Merge. If a recipient needs one paper size, fix the sources first, then merge pdf again. Cropping and rotating live in other tools in the same app. This page stays on combining files.

A 200 page scan set that a free website rejects can still merge here if the PC can open the files. If the job crawls, the files are huge or the PC is busy. Close other apps. Merge in batches: five files into a subpacket, five more into another, then merge those two results. That is still merge pdf. You are chaining the same tool. You are not looking for a different product.

Local vs upload, for this job only

Upload is convenient. You skip install. The site does the bytes. The cost is the files sit on someone else's machine for a while, plus account walls and size caps when the packet is large. Merge pdf as we sit on it is the install path. Your disk, your RAM, your limit.

We do not invent iLovePDF file-size numbers. Their website has plan limits that change. Stirling PDF is limited by the machine in front of you. If merge pdf is slow, wait it out or batch it. Do not switch to a random tab because the first run took a minute. The packet with names is still the packet with names.

PDF editor or Bento is a different comparison: an install versus a toolkit that stays in a browser tab. Bento is not the merge walkthrough. If you already know you want the files to stay on the PC, stay on this page and run Merge in Stirling PDF.

How do I merge pdf without a website?

Install Stirling PDF from the command on this page, or from GitHub Releases. Open Merge. Add the files. Save on this machine. Docker is the same job at http://localhost:8080. This site does not host your files.

What is the winget command for merge pdf?

The command is winget install StirlingTools.StirlingPDF. Copy it from the box on this page. That installs the app. Merge is a tool inside the app, not a second installer.

Can I merge pdf in Docker?

Yes. Run compose from the Docker page, open http://localhost:8080, open Merge, add files, save the result. Login is on by default on that compose. Desktop skips that login.

Does merge pdf keep my page order?

Yes, in the order you put the files in the list. It will not guess a better order. If page 1 is wrong, move that file in the list and run Merge again.

Did you make this merge pdf tool?

No. Stirling PDF is the project we point to. Official files live on GitHub Releases. This site only points at that page. Skip Softonic, CNET, and unofficial wrappers.

Related jobs: compress pdf, split pdf, Stirling PDF vs iLovePDF, PDF editor or Bento. File host: GitHub Releases.